An insight into the passivation of cupronickel alloys in chloride environment

Authors
Mathiyarasu, J Palaniswamy, N Muralidharan, VS
Citation
J. Mathiyarasu et al., An insight into the passivation of cupronickel alloys in chloride environment, P I A S-CH, 113(1), 2001, pp. 63-76
Citations number
22
Categorie Soggetti
Chemistry
Journal title
PROCEEDINGS OF THE INDIAN ACADEMY OF SCIENCES-CHEMICAL SCIENCES
ISSN journal
02534134 → ACNP
Volume
113
Issue
1
Year of publication
2001
Pages
63 - 76
Database
ISI
SICI code
0253-4134(200102)113:1<63:AIITPO>2.0.ZU;2-Y
Abstract
Cupronickels offer enhanced corrosion protection in marine environments by the formation of passive films on the surface. Cyclic voltammetric studies were carried on cupronickels in chloride solutions at pH 6.3 to understand the role of chloride ions in passive film formation. Increase in nickel con tent of the alloy and of chloride ions in solution decreases film resistanc e. Chloride ions take part in reduction of the passive film to copper. A so lid-state model for passive film formation involving chloride ions has been attempted.